const readline = require('readline');
 
const rl = readline.createInterface({
  input: process.stdin, 
  output: process.stdout
});
 
let arr;
const init = val => arr = Array.apply(null, Array(20)).map(() => val);
 
(async() => {
	init(false);
	for await (let line of rl) {
		let [proc, k] = line.split(" ");
		k = parseInt(k) - 1;
		if (proc === "add") arr[k] = 1;
		if (proc === "remove") arr[k] = 0;
		if (proc === "check") console.log(arr[k] | 0);
		if (proc === "toggle") arr[k] = !arr[k];
		if (proc === "all") init(true);
		if (proc === "empty") init(false);
	}
})();
 

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26
add 1
add 2
check 1
check 2
check 3
remove 2
check 1
check 2
toggle 3
check 1
check 2
check 3
check 4
all
check 10
check 20
toggle 10
remove 20
check 10
check 20
empty
check 1
toggle 1
check 1
toggle 1
check 1